package com.jsj.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class CharactorEndingFilter implements Filter {

	String encoding;
	
	@Override
	public void destroy() {
		this.encoding=null;

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		System.out.println("进入编过滤器");
		if(encoding==null) {
			encoding="utf-8";
		}
		request.setCharacterEncoding(encoding);
		chain.doFilter(request, response);
		System.out.println("离开编码过滤器");
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		this.encoding=config.getInitParameter("encoding");
	}

}
